Question

我有两个片段：一个Activity中的fragmentA和dialogFragmentB。 fragmentB有两个alertDialogs，它从dialogA开始，然后dialogA调用dismiss（）并生成dialogB。 fragmentA有方法onActivityResult（）和dialogB（来自dialogFragmentB）必须在按钮的点击后发送一些意图结果。但在我发送结果之前，我必须设置目标fragmentA。如何在dialogB的onClick方法中执行此操作？

我想我需要这样的东西：

public void onClick(){
     ...
     dialogB.dismiss();
     fragmentA.setTargetFragment(FragmentA, requestCode);
}

但我有一个错误：找不到符号变量FragmentA

谢谢！

Answer 1

使用变量引用而不是类名：

public void onClick(){
     ...
     dialogB.dismiss();
     // note the lowercase "f"
     fragmentA.setTargetFragment(fragmentA, requestCode);
}

Answer 2

我已经通过下一个方式解决了我的问题：

public class DialogFragmentB extends DialogFragment{
   ...
   public Dialog onCreateDialog (Bundle b){
   // here i create two dialogs, first dialogA and then it calls dialogB
   // finally dialogB has to return his datas and datas from dialogA in fragmentA
      ...
      public void onClick(View v){
         ...
         FragmentManager fm = getFragmentManager();
         // these two code's lines resolved my headache --------------
         Fragment ft = fm.findFragmentByTag(FragmentA.FRAGMENT_A_TAG);
         ft.setTargetFragment(ft, FragmentA.CODE_REQUEST);
         // ----------------------------------------------------------
         dialogB.dismiss();
         sendResult(Activity.RESULT_OK, myData);
      }
      return dialogB;
   }
   // And here myData goes in onActivityResult in fragmentA
    private void sendResult(int resultCode, MyData myData){
        if(getTargetFragment() == null){
            return;
        }
        Intent intent = new Intent();
        intent.putExtra(EXTRA_DATE_2, myData);
        getTargetFragment().onActivityResult(getTargetRequestCode(), resultCode, intent);
    }
}

如何设置目标片段

2 个答案: